package cn.cocho.android.mc.comp.button;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;

import cn.cocho.android.mc.R;

public class SlipButton extends View implements OnTouchListener {

	private static final String ON_BG = "slipButton_on_bg";
	private static final String OFF_BG = "slipButton_off_bg";
	private static final String SLIP_BTN_ICON = "slipButton_slip_btn";
	
	private boolean NowChoose = false;// 记录当前按钮是否打开,true为打开,flase为关闭
	private boolean OnSlip = false;// 记录用户是否在滑动的变量
	private float DownX, NowX;// 按下时的x,当前的x,
	private Rect Btn_On, Btn_Off;// 打开和关闭状态下,游标的Rect

	private boolean isChgLsnOn = false;
	private OnChangedListener ChgLsn;

	private Bitmap bg_on, bg_off, slip_btn;
	private AttributeSet attrs;
	
	//*
	private Drawable onBg;
	private Drawable offBg;
	private Drawable slipBtnIcon;

	public SlipButton(Context context) {
		super(context);
//		init();
	}
	
	//*
	public SlipButton(Context context, AttributeSet attrs,int defstyle){
		super(context, attrs, defstyle);
	}

	public SlipButton(Context context, AttributeSet attrs) {
		super(context, attrs);
		this.attrs=attrs;
//		init();
		//*↑
		init(context);
	}
	


//	private void init() {
//		// 载入图片资源
//		Drawable onBg = getDrawable(ON_BG);
//		Drawable offBg = getDrawable(OFF_BG);
//		Drawable slipBtnIcon = getDrawable(SLIP_BTN_ICON);
//		bg_on =((BitmapDrawable) onBg).getBitmap();
//		bg_off =((BitmapDrawable) offBg).getBitmap();
//		slip_btn =((BitmapDrawable) slipBtnIcon).getBitmap();
//		
//		// 获得需要的Rect数据
//		Btn_On = new Rect(0, 0, slip_btn.getWidth(), slip_btn.getHeight());
//		Btn_Off = new Rect(bg_off.getWidth() - slip_btn.getWidth(), 0, bg_off.getWidth(), slip_btn.getHeight());
//		setOnTouchListener(this);// 设置监听器,也可以直接复写OnTouchEvent
//	}
	
	//*↑
	private void init(Context context) {
		// 载入图片资源
		TypedArray tdarr = context.obtainStyledAttributes(attrs, R.styleable.SlipButton);
		onBg = tdarr.getDrawable(R.styleable.SlipButton_slipButton_on_bg);
		offBg = tdarr.getDrawable(R.styleable.SlipButton_slipButton_off_bg);
		Drawable slipBtnIcon = tdarr.getDrawable(R.styleable.SlipButton_slipButton_slip_btn);
		tdarr.recycle();
		
		bg_on =((BitmapDrawable) onBg).getBitmap();
		bg_off =((BitmapDrawable) offBg).getBitmap();
		slip_btn =((BitmapDrawable) slipBtnIcon).getBitmap();
		
		// 获得需要的Rect数据
		Btn_On = new Rect(0, 0, slip_btn.getWidth(), slip_btn.getHeight());
		Btn_Off = new Rect(bg_off.getWidth() - slip_btn.getWidth(), 0, bg_off.getWidth(), slip_btn.getHeight());
		setOnTouchListener(this);// 设置监听器,也可以直接复写OnTouchEvent
	}
	
//	private Drawable getDrawable(String eventName) {
//		Drawable drawable = null;
//		Resources resources = getResources();
//		int drawableId = attrs.getAttributeResourceValue(CompUtils.NS_TBC, eventName, 0);// 读取该属性的值
//		if (drawableId > 0) {
//			drawable = resources.getDrawable(drawableId);
//		}
//		return drawable;
//	}

	@Override
	protected void onDraw(Canvas canvas) {// 绘图函数
		super.onDraw(canvas);
		Matrix matrix = new Matrix();
		Paint paint = new Paint();
		float x;

		if (NowX < (bg_on.getWidth() / 2))// 滑动到前半段与后半段的背景不同,在此做判断
			canvas.drawBitmap(bg_off, matrix, paint);// 画出关闭时的背景
		else
			canvas.drawBitmap(bg_on, matrix, paint);// 画出打开时的背景

		if (OnSlip){// 是否是在滑动状态,
			if (NowX >= bg_on.getWidth())// 是否划出指定范围,不能让游标跑到外头,必须做这个判断
				x = bg_on.getWidth() - slip_btn.getWidth() / 2;// 减去游标1/2的长度...
			else
				x = NowX - slip_btn.getWidth() / 2;
		} else {// 非滑动状态
			if (NowChoose)// 根据现在的开关状态设置画游标的位置
				x = Btn_Off.left;
			else
				x = Btn_On.left;
		}
		if (x < 0)// 对游标位置进行异常判断...
			x = 0;
		else if (x > bg_on.getWidth() - slip_btn.getWidth())
			x = bg_on.getWidth() - slip_btn.getWidth();
		canvas.drawBitmap(slip_btn, x, 0, paint);// 画出游标.
	}

	@Override
	public boolean onTouch(View v, MotionEvent event) {
		// TODO Auto-generated method stub
		switch (event.getAction()) {// 根据动作来执行代码
		case MotionEvent.ACTION_MOVE:// 滑动
			NowX = event.getX();
			break;
		case MotionEvent.ACTION_DOWN:// 按下
			if (event.getX() > bg_on.getWidth() || event.getY() > bg_on.getHeight())
				return false;
			OnSlip = true;
			DownX = event.getX();
			NowX = DownX;
			break;
		case MotionEvent.ACTION_UP:// 松开
			OnSlip = false;
			boolean LastChoose = NowChoose;
			if (event.getX() >= (bg_on.getWidth() / 2))
				NowChoose = true;
			else
				NowChoose = false;
			if (isChgLsnOn && (LastChoose != NowChoose))// 如果设置了监听器,就调用其方法..
				ChgLsn.OnChanged(NowChoose);
			break;
		default:

		}
		invalidate();// 重画控件
		return true;
	}

	public void SetOnChangedListener(OnChangedListener l) {// 设置监听器,当状态修改的时候
		isChgLsnOn = true;
		ChgLsn = l;
	}

	public boolean isNowChoose() {
		return NowChoose;
	}

	public void setNowChoose(boolean nowChoose) {
		NowChoose = nowChoose;
		if(nowChoose){
			NowX=bg_on.getWidth() / 2 +1;
		}else{
			NowX=bg_on.getWidth() / 2 -1;
		}
		invalidate();
	}

	public interface OnChangedListener {
		abstract void OnChanged(boolean CheckState);
	}
}
